Differences between WR205F and YZ250F: 2002

WR250F

YZ250F

Transmission

5 Speed Wide-ratio

5 Speed Close-ratio

Gearing

1^st = 31/13 (2.384)

2^nd = 28/16 (1.750)

3^rd = 28/21 (1.333)

4^th = 25/24 (1.042)

5^th = 22/27 (0.814)

1^st = 30/14 (2.143)

2^nd = 28/16 (1.750)

3^rd = 29/20 (1.450)

4^th = 27/22 (1.227)

5^th = 25/24 (1.042)

Final Gearing

13/52 (4.000) (steel / steel)

13/48 (3.692) (steel / alum)

Chain

O-Ring

Exposed Bearing

Rear Wheel

18”

19”

Suspension Valving

Off-Road

MX

Weighted Flywheel

Yes

No

Stock Jetting

Main Jet: #175
Main Air Jet: #200
Jet Needle: OBELQ-3
Pilot Jet: #40
Pilot Air Jet: #75
Pilot Screw: 2
Starter Jet: #72
Leak Jet: #60
Float Height: 0.31

Main Jet: #178
Main Air Jet: #200
Jet Needle: OBEKP-4
Pilot Jet: #40
Pilot Air Jet: #100
Pilot Screw: 1-5/8
Starter Jet: #72
Leak Jet: #100
Float Height: 0.31

Exhaust Cam Timing

127.5 degrees

105 degrees

Air Cut Valve

Yes

No

CDI Map

Gray Wire

No Gray Wire

Fuel Capacity

3.2 gallons w/ reserve

2.1 gallons no reserve

Radiator

11 Tubes + overflow canister

10 Tubes

Spark Arrestor

Yes

No

Subframe

Steel

Aluminum

Left Engine Guard

Yes

No

Lights

Headlight / Taillight

None

Stator

120 W

??

Sidestand

Yes

No

Odometer

Yes

No

Top Speed

+15 mph

Seat

Compromised

Normal